Why Do Blueberries Stain? The Science Behind the Purple Mark
                                
                                
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                                    4 min read                                
                            
                                Blueberries contain some of the highest levels of antioxidants of any common fruit, but these powerful compounds are also the same pigments responsible for their notorious staining power. This deep blue-purple hue, so beneficial for our health, can become a menace when it transfers to clothing, teeth, or countertops.